The ornamental design for a lower bodygarment, as shown and described.
FIG. 1 is a front left perspective view of a lower body garment showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof; and,
FIG. 5 is a left side view thereof.
The broken lines immediately adjacent to the shaded area represent unclaimed boundaries of the design. The solid lines not adjacent to the shaded area are claimed. The broken lines showing the remainder of the garment represent unclaimed subject matter and form no part of the claimed design. The contrast in shading represents a contrast in appearance only and does not represent any particular color, material, texture or finish.